Prior to posting questions on specific toys, you may want to read a review or two, which may answer your question a lot faster. On the main page of this toy, I found this quote on how long you should wear it for, so even if it lasts for a longer session, you shouldn't wear it for one:

"(Cock rings should not be worn for longer than 30 minutes at a time with an hour between sessions)"

Also, it is made of silicone, which is one of the best materials money can buy in the toy world